Astrofísicas: Materia oscura

  • Publicación
    Stellar Tidal Streams in Spiral Galaxies of the Local Volume: A Pilot Survey with Modest Aperture Telescopes
    Within the hierarchical framework for galaxy formation, minor merging and tidal interactions are expected to shape all large galaxies to the present day. As a...
  • Publicación
    Stellar velocity profiles and line strengths out to four effective radii in the early-type galaxies NGC3379 and 821
    We use the integral-field spectrograph SAURON to measure the stellar line-of-sight velocity distribution and absorption line strengths out to four effective...
  • Publicación
    Strong lensing reveals jets in a sub-microJy radio-quiet quasar
    We present e-MERLIN and European VLBI Network observations which reveal unambiguous jet activity within radio-quiet quasar HS 0810+2554. With an intrinsic flux...
  • Publicación
    Study of the Sextans dwarf spheroidal galaxy from the DART Ca II triplet survey
    We use Very Large Telescope (VLT)/Fibre Large Array Multi Element Spectrograph (FLAMES) intermediate-resolution (R˜ 6500) spectra of individual red giant branch...
  • Publicación
    Testing Axion Physics in a Josephson Junction Environment
    We suggest that experiments based on Josephson junctions, SQUIDS, and coupled Josephson qubits may be used to construct a resonant environment for dark matter...
  • Publicación
    Testing the conditional mass function of dark matter haloes against numerical N-body simulations
    We compare the predicted conditional mass function (CMF) of dark matter haloes from two theoretical prescriptions against numerical N-body simulations, both in...
  • Charla
    The (very) small-scale structure of dark matter halos
    In our now-standard picture for the growth of structure, dark matter halos are the basic unit of nonlinear structure in the present Universe. I will report...
  • Publicación
    The abundance of clustered primordial black holes from quasar microlensing
    While elementary particles are the favored candidate for the elusive dark matter, primordial black holes (PBHs) have also been considered to fill that role...
  • Publicación
    The ALHAMBRA survey: Estimation of the clustering signal encoded in the cosmic variance
    Aims: The relative cosmic variance (σv) is a fundamental source of uncertainty in pencil-beam surveys and, as a particular case of count-in-cell statistics, can...